LHR → USM
Cheap flights from London to Ko Samui
We track fares from London to Ko Samui, Thailand every day. Across 76 prices we've logged, the cheapest was €794 return and a typical fare runs around €881. The cheapest month to fly is usually Dec 2026.
Cheapest seen
€794
Typical price
€881
Cheapest month
Dec 2026
Non-stop
With a stop
No live deal on this exact route right now — but the typical fare is around €881. Search your dates below, or browse all deals to Thailand.
Cheapest months to fly
The typical cheapest fare by month, from our tracking — a guide only. Check the live price on Aviasales before booking.
| Month | Typical from | Check price |
|---|---|---|
| Sept 2026 | €834 | Check on Aviasales → |
| Nov 2026 | €801 | Check on Aviasales → |
| Dec 2026 | €794 | Check on Aviasales → |
Each link opens the live Aviasales search for that month, where you can pick the exact cheapest dates.
Book a flight
London to Ko Samui: the basics
- Route
- London (LHR) → Ko Samui (USM)
- Distance
- 9,896 km
- Non-stop
- No (with a stop)
- Airlines seen
- Aegean Airlines, Air India, Air China, China Southern, Etihad Airways, Swiss
Planning the trip? Thailand: what to see and when to go covers where to go and when.
Where these flights connect
There is no non-stop flight from London to Ko Samui. Based on the airlines that fly this route, connections are usually through Athens, Abu Dhabi, Zurich — worth checking when you compare fares.